GB992275A - Improvements relating to apparatus for stopping an electrically driven machine part in a pretermined position - Google Patents

Improvements relating to apparatus for stopping an electrically driven machine part in a pretermined position

Info

Publication number
GB992275A
GB992275A GB30888/62A GB3088862A GB992275A GB 992275 A GB992275 A GB 992275A GB 30888/62 A GB30888/62 A GB 30888/62A GB 3088862 A GB3088862 A GB 3088862A GB 992275 A GB992275 A GB 992275A
Authority
GB
United Kingdom
Prior art keywords
motor
transistor
brake
energized
photo
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB30888/62A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB992275A publication Critical patent/GB992275A/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B69/00—Driving-gear; Control devices
    • D05B69/22—Devices for stopping drive when sewing tools have reached a predetermined position

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

992, 275. Sewing machines. O. B. SCHWAB, [trading as FRANKL & KIRCHNER]. Aug. 13, 1962 [Aug. 23, 1961], No. 30888/62. Heading D1G. [Also in Division H2] To stop a series commutator motor 7 driving a sewing machine, treadle 1 is released so that starting resistance 4 is increased until the motor is de-energized. Contacts 5, 6, are engaged before the motor comes to a standstill and a control circuit comprising transformer 12, 13 is energized. A transistor 16 is conductive, provided that centrifugal switch 11 is closed, so that electromagnetic brake 10 is excited to apply the brake and relay 17 responds so that the motor remains disconnected from the line during the braking operation. When the motor reaches a low speed, the centrifugal switch is opened whereby control of transistor 16 is taken over by photo-transistor 18. If the transistor receives light from source 14 by way of reflector 21 on balance wheel 22, its resistance is reduced and transistor 16 remains conductive so that the motor continues to be braked and may come to a standstill. The setting of reflector 21 corresponds to the dead centre position of the sewing machine needle. If the machine overruns this position, the motor is re-connected and continues to operate until the reflector again throws light upon the photo-transistor element whereupon the brake is re-applied. The brake comprises armature 27 coupled to rotor shaft 26, the brake coil being associated with non-magnetic disc 30 having a friction surface. A magnetic disc 32 is fixed to the armature 27. When the motor is energized, the brake is released due to axial movement of the rotor. The centrifugal switch 11 comprises insulating disc 34 supporting spring elements 35, 36, to which are fastened carbon brushes 37, 38. The rotating part of the switch comprises insulating plate 41 having slip-rings 42, 43. Weights 44, 45, are interconnected by a strap and are adapted to engage members 47, 48, connected to the sliprings. At low speeds, one or both weights hang down to interrupt the current. The control components except the photo-transistor 18 and light source 14 are accommodated within the motor housing.
GB30888/62A 1961-08-23 1962-08-13 Improvements relating to apparatus for stopping an electrically driven machine part in a pretermined position Expired GB992275A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF34753A DE1160075B (en) 1961-08-23 1961-08-23 Device for stopping an electric motor drive in a certain angular position, especially for sewing machines

Publications (1)

Publication Number Publication Date
GB992275A true GB992275A (en) 1965-05-19

Family

ID=7095695

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30888/62A Expired GB992275A (en) 1961-08-23 1962-08-13 Improvements relating to apparatus for stopping an electrically driven machine part in a pretermined position

Country Status (3)

Country Link
US (1) US3187701A (en)
DE (1) DE1160075B (en)
GB (1) GB992275A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3412260A (en) * 1963-09-20 1968-11-19 Frankl & Kirchner Electrical drive means, particularly for sewing machines
DE1243412B (en) * 1966-02-24 1967-06-29 Braun Ag Drive for disc-shaped sound carriers
US3538743A (en) * 1968-09-03 1970-11-10 Avco Corp Shock-testing machine control system
US3604546A (en) * 1969-08-18 1971-09-14 Computervision Corp Angular registration assembly and driving apparatus therefor
JPS5714875B2 (en) * 1973-03-23 1982-03-26
US4554498A (en) * 1981-03-16 1985-11-19 Mitsubishi Denki Kabushiki Kaisha Control apparatus for running moving object

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE561917C (en) * 1932-10-20 Aeg Device for monitoring centrifugal contact regulators for electric motors
DE461905C (en) * 1923-01-14 1928-07-02 Lorenz Akt Ges C Centrifugal governor for keeping constant the number of revolutions of prime movers, especially electrical machines
DE607468C (en) * 1931-11-27 1934-12-28 Aeg Automatic control for spindle adjustment devices driven by an electric motor
US2129847A (en) * 1932-09-17 1938-09-13 Agfa Ansco Corp Winding roll film
DE869288C (en) * 1948-10-02 1953-03-02 Elektror Karl W Mueller Control starter sewing motor
DE1041780B (en) * 1952-07-22 1958-10-23 Singer Mfg Co Drive device for sewing machines
US2753502A (en) * 1952-12-02 1956-07-03 Bardons And Oliver Inc Electric motor control for spindle positioner
US2920221A (en) * 1954-10-01 1960-01-05 Schwab Olga Brunhilde Sewing machine drive system
FR1142432A (en) * 1954-12-15 1957-09-18 Wuertt Elektromotoren G M B H Housing for electric motor, in particular for sewing machine motor, combined with a starter-regulator
US2886755A (en) * 1955-05-24 1959-05-12 Honeywell Regulator Co Servomotor system control apparatus
US2920257A (en) * 1957-05-09 1960-01-05 John H Miles Sewing machine motor control
US2946418A (en) * 1957-09-20 1960-07-26 Warner Electric Brake & Clutch Electrical control of torque transmitting mechanism
US2939064A (en) * 1959-05-20 1960-05-31 Singer Mfg Co Motor control systems

Also Published As

Publication number Publication date
DE1160075B (en) 1963-12-27
US3187701A (en) 1965-06-08

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